The Eucharist was instituted by Christ on Holy Thursday: "On the night before he died he had supper with his friends and, taking bread, he praised you. He broke the bre
…ad, gave it to them and said: Take, eat; this is my body which is given for you; do this in remembrance of me. When supper was ended he took the cup of wine. Again he praised you, gave it to them and said: Drink this, all of you; this is my blood of the new covenant, which is shed for you and for many for the forgiveness of sins. Do this, as often as you drink it, in remembrance of me." The short phrases above instituted both the Eucharist and the Sacrament of Holy Orders. ( Full Answer )